1. Notice if the equation is addition or subtraction. 2. Use the opposite operation to add or subtract the number on one side of the equation to the other side. (Whatever is done to one side of an equation must be done to the other.) 3. Solve to find x.
-Solving equations by adding and subtracting
Steps-
1. Notice if the equation is addition or subtraction.2. Use the opposite operation to add or subtract the number on one side of the equation to the other side. (Whatever is done to one side of an equation must be done to the other.)
3. Solve to find x.
Example 1-
x+7=9
-7 -7
x=2
Example 2-
x-3=2
+3 +3
x=5